Generate a spase file in linux

Generate the spase file in linux-Linux Enterprise Application-Linux server application information. For more information, see. Dd if =/dev/zero of = fs. img bs = 1 K seek = 10240 count = 0

[Root @ linux_c ~] # Ll fs. img
-Rw-r -- 1 root 10485760 Oct 13 fs. img
[Root @ linux_c ~] # Du fs. img
0 fs. img

Back up to networker display
Root @ linux_a nsr] # mminfo-r "nsavetime, name, volume, client, sumsize"-N/root/fs. img
Save time name volume client size
1223880063/root/fs. img test. a linux_c.shecs.com 4 KB

Show after recovery
[Root @ linux_c ~] # Ll fs. img *
-Rw-r -- 1 root 10485760 Oct 13 fs. img
-Rw-r -- 1 root 10485760 Oct 13 fs. img. R
[Root @ linux_c ~] # Du fs. img *
0 fs. img
12 fs. img. R